require 'sinatra/base'
module Sinatra
  # module to catch Sinatra errors and send a email
  module ExceptionMailer
    def initialize(app)
      @app = app
      # set parameters here..
      yield self if block_given?
    end

    def call(env)
      status, headers, body =
        begin
        @app.call(env)
      rescue => error_raised
        # TODO don't allow exceptions from send_notification to
        # propogate
        send_notification error_raised, env
       raise
      end
      [status, headers, body]
    end

    private

    def send_notification(exception, env)
      puts "SENDING NOTIFICATION for :#{exception}"
    end
  end

  register ExceptionMailer
end